Improvement in automatic gates



1.63088. Automatic-Gates.

Patented Jn.`27, T374.

,AMW d.

I ventura Per Attorneys.`

UNITED STATES PATENT OFFICE.

JACOB GROB'B, OF CLINTON, CANADA.

IMPROVEMENT IN AUTOMATIC GATES.

Specilication forming part of Letters Patent No. 146,823, dated January27, 1874; application filed August 4, 1873.

To all whom it may concern:

Be it known that I, JAcoB GROBB, of Glinton, in the county of Lincoln,Province of Ontario and Dominion of Canada, have invented a new anduseful Improvement in Gate Attachments, of which the following is aspecifiv cation:

The invention relates to an improvement in automatic gates.

The improvement consists in so arranging a pivoted weighted frame andendless cord in connection with the gate that the same is swung ineither direction, to open or shut it,

closed by means of a cord, D, the ends of which are attached to theframe G. The legs of this frame are confined to the ground by means ofeyes, so that the frame may freelyvibrate back and forth from an uprightposition. The eyes which confine the frame are placed at an angle ofthirty degrees, more or less, with the closed gate. The top of the frameis connected with a sliding bar, II, by means of a rod, I, and clevis J,and the bar is connected with The fastening-spring K of the gate by therod K'. Then the gate is closed, the frame is inclined and stands at auangle with the surface ofthe ground of about thirty degrees. One

end of the cord -or rope D is attached to onek leg of the frame, andthen extends to the upright standard L, where it passes through thetackle-blocks m, a, and o, and is extended to the standard P, where itpasses through three more tackle-blocks,the same as before, from whichblocks it is returned, and its other end is fastened to the other leg ofthe frame, as

seen at Q. The long stretch of cord R passes through a supporting-eye,S, on the gate-post B. When the cord is drawn in the direction indicatedby the arrow, the gate will be opened. The cord will freely renderthrough all the tackle-blocks, and the frame will be drawn to an uprightor perpendicular position when the gate is about half open, or at anangle with the road of about forty-iive degrees. A continued pull opensthe gate entirely, and inclines the frame in the opposite direction, andto about the same angle at which it stood when the gate was closed. T isa post,to which the gate is fastened by the spring K when the latter isopened. The first pull on the cord will be felt by the frame, which willcommence to rise, and in`doing so will draw on the sliding bar H, andthereby draw back the fasteningspring K and unfasten the gate. The gateis closed by pulling the cord in an opposite di rection, and the sameeffect is produced `on the frame. As it commences to rise it slides thebolt H, and draws the spring K from the catch on the post T. Thetackle-blocks on a are attached to brackets u. u. The blocks o areattached by rings to the long staples V V, so that they rise and fallaccording to the tension of the cord. Any kindof pulley suitable for thepurpose may be used instead of the tackle-blocks. The cord may be of anylength so that a person in a wagon or carriage, or on The combination,with the gate A and latch` mechanism K K H, of the pivoted and weightedframe G, rod I, and endless rope or cord D, connected with posts L I?,all as shown and described.

JACOB GROBB. Witnesses W. A. BRENNAN, C. A. CLARKE.

